US5190419A - Ball end mill and throw away insert for such end mill - Google Patents

Ball end mill and throw away insert for such end mill Download PDF

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Publication number
US5190419A
US5190419A US07/717,644 US71764491A US5190419A US 5190419 A US5190419 A US 5190419A US 71764491 A US71764491 A US 71764491A US 5190419 A US5190419 A US 5190419A
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US
United States
Prior art keywords
cutting edges
top face
insert
edge
viewed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/717,644
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English (en)
Inventor
Hans Lindberg
Lars-Gunnar Wallstrom
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sandvik AB
Original Assignee
Sandvik AB
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Filing date
Publication date
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Assigned to SANDVIK AB A CORPORATION OF SWEDEN reassignment SANDVIK AB A CORPORATION OF SWEDEN ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: LINDBERG, HANS, WALLSTROM, LARS-GUNNAR
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Publication of US5190419A publication Critical patent/US5190419A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/02—Milling-cutters characterised by the shape of the cutter
    • B23C5/10—Shank-type cutters, i.e. with an integral shaft
    • B23C5/1009—Ball nose end mills
    • B23C5/1027—Ball nose end mills with one or more removable cutting inserts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C5/00—Milling-cutters
    • B23C5/16—Milling-cutters characterised by physical features other than shape
    • B23C5/20—Milling-cutters characterised by physical features other than shape with removable cutter bits or teeth or cutting inserts
    • B23C5/22—Securing arrangements for bits or teeth or cutting inserts
    • B23C5/2204—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert
    • B23C5/2208—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts 
    • B23C5/2213—Securing arrangements for bits or teeth or cutting inserts with cutting inserts clamped against the walls of the recess in the cutter body by a clamping member acting upon the wall of a hole in the insert for plate-like cutting inserts  having a special shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/08—Rake or top surfaces
    • B23C2200/083—Rake or top surfaces curved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/08—Rake or top surfaces
    • B23C2200/086—Rake or top surfaces with one or more grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/12—Side or flank surfaces
    • B23C2200/123—Side or flank surfaces curved
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/201—Details of the nose radius and immediately surrounding areas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/203—Curved cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/20—Top or side views of the cutting edge
    • B23C2200/205—Discontinuous cutting edges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23C—MILLING
    • B23C2200/00—Details of milling cutting inserts
    • B23C2200/36—Other features of the milling insert not covered by B23C2200/04 - B23C2200/32
    • B23C2200/367—Mounted tangentially, i.e. where the rake face is not the face with largest area
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1908—Face or end mill
    • Y10T407/1924—Specified tool shape
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1946—Face or end mill
    • Y10T407/1948—Face or end mill with cutting edge entirely across end of tool [e.g., router bit, end mill, etc.]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T407/00—Cutters, for shaping
    • Y10T407/23—Cutters, for shaping including tool having plural alternatively usable cutting edges

Definitions

  • the present invention relates to a ball end mill for the chipforming machining of metal workpieces.
  • the end mill comprises a tool body that is rotatable about its longitudinal axis.
  • the forward end of the tool body is hemispherically shaped and has several separate pockets for the receipt of indexable inserts.
  • One of the inserts is substantially triangular in shape and is mounted tangentially in the mantle surface of the tool body close to its center such that the main cutting edge of the insert is oriented generally radially and has one of its corner portions located at the center of the tool body.
  • the invention furthermore relates to a polygonal throw away insert specifically designed for use with such an end mill.
  • Such ball nose end mills with indexable inserts are previously known, for instance as disclosed in U.S. Pat. No. 4,252,480. That ball nose end mill includes a central insert having a cutting edge of convex shape along a portion of the periphery of one of its side surfaces for the purpose of reducing the thrust forces.
  • a basically similar ball end mill with throw away inserts is known from U.S. Pat. No. 4,618,296 in which all inserts have a generally triangular shape and are tangentially oriented in the tool body. The convex formation is achieved by making the outermost surface of the insert partially convex in shape.
  • each insert of the above-described known ball end mills becomes high and are unfavorably distributed over the tool body. Further, each insert must be active during a long cutting engagement in the workpiece. It would, therefore, be desirable to provide a ball end mill with several inserts that are mounted in an optimal fashion over the mantle surface of the end mill so that a more limited portion of the cutting insert corner comes into engagement with the workpiece at different engagements.
  • a ball nose end mill comprising a rotary body which is rotatable about a longitudinal axis.
  • a forward end surface of the body is of generally hemispherical shape and includes a plurality of cavities.
  • Indexable cutting inserts are mounted in respective ones of the cavities.
  • a central one of the inserts is of substantially triangular shape and is mounted closely adjacent the longitudinal axis.
  • the front insert includes a forwardly facing, substantially triangular top face, and a plurality of edge faces intersecting one another to form three corner regions and intersecting the top face to form therewith a plurality of main cutting edges.
  • Each of the main cutting edges is disposed between two of the corner regions and is convexly curved when viewed in a direction toward its respective edge face.
  • the central insert is mounted such that one of the main cutting edges thereof constitutes an active cutting edge positioned in a cutting orientation.
  • One of the corner regions of the central insert is situated at an end of the active cutting edge and is located immediately adjacent the axis.
  • the cutting inserts include additional inserts of substantially rectangular shape.
  • Each of the additional cutting inserts includes a circumferentially facing, generally rectangular top face and a plurality of edge faces interconnecting such top face to form therewith a plurality of cutting edges.
  • Each of the additional inserts is arranged such that one cutting edge thereof constitutes an active cutting edge positioned in a cutting orientation.
  • the plurality of additional inserts includes first and second additional inserts whose cutting edges are convexly curved when viewed in a direction toward their respective top faces.
  • the first and second additional inserts have their active cutting edges disposed on opposite sides of the axis and lying generally in a first plane which contains the axis.
  • the present invention also relates to an indexable cutting insert which is adapted for use in a ball nose end mill.
  • That insert comprises a substantially flat bottom face from which the insert is to be supported, and a generally convexly top face disposed opposite the bottom face.
  • a plurality of edge faces interconnect the top and bottom faces and intersect the top face at an acute angle.
  • the intersection of the end faces with the top face forms a plurality of main cutting edges and a plurality of secondary cutting edges.
  • the secondary cutting edges are located at respective corner regions of the insert and are convexly curved when the top face is viewed in plan.
  • Each of the main cutting edges is located between respective pairs of the corner regions and is generally convexly curved when viewed in a direction toward its respective edge face.
  • Each of the main cutting edges is straight when the top face is viewed in plan.
  • Each of the secondary cutting edges intersects first and second ones of the main cutting edges at first and second points of intersection, respectively.
  • a first line tangent to the first point of intersection coincides with the first main cutting edge as the top face is viewed in plan.
  • a second line tangent to the second point of intersection forms an angle with the second main cutting edge as the top face is viewed in plan.
  • FIG. 1 is an end view of a ball end mill having a plurality of indexable inserts, according to the present invention
  • FIG. 1A is a side view of the center insert as seen in direction D--D in FIG. 1;
  • FIG. 2 is a side elevational view of the ball end mill as seen in direction A--A in FIG. 1;
  • FIG. 3 is a side elevational view as seen in direction C--C in FIG. 1;
  • FIG. 4 is a side elevational view as seen in direction B--B in FIG. 1;
  • FIG. 5 is a side elevational view as seen in direction D--D in FIG. 1;
  • FIG. 6 is a plan view of the central insert
  • FIG. 7 is a sectional view taken along the line VII--VII in FIG. 6;
  • FIG. 8 is a sectional view taken along the line VIII--VIII in FIG. 6;
  • FIG. 9 is a side elevational view of an alternative embodiment of a ball end mill according to the invention.
  • FIG. 10 is a plan view of the alternative embodiment of the central insert of FIG. 9.
  • FIG. 11 is a side view of the alternative insert as seen from the right hand side in FIG. 10.
  • a ball nose end mill has a cylindrical shank 10 rotatable in a direction of cutting CD around a central longitudinal axis 11.
  • the shank terminates in a substantially hemispherical cutting face 12 in which there are provided cavities.
  • the surface 12 is generated by a radius R' (see FIG. 2).
  • the cavities are shaped to receive indexable cutting inserts 13-19 made preferably of cemented carbide.
  • a central insert 13, i.e., the insert located close to the longitudinal axis 11, includes a bottom face 20 and a top face 21 (see FIG. 1A).
  • the insert 13 is of substantially triangular shape when viewed in plan, i.e., in a direction toward its top face (see FIG. 1).
  • the top face 21 is convexly shaped, more specifically is in the general shape of a portion of a sphere so as to generally conform to the profile of the hemispherical face 12 (see FIG. 3). All of the additional inserts 14-19 of this end mill are substantially rectangular in shape and have planar, parallel bottom and top faces.
  • top faces of all of the inserts 13-19 are centrally apertured for the receipt of central clamp screws for securing the inserts to the end mill body. That aperture extends completely through the top and bottom faces of the respective insert.
  • Each insert includes edge faces (e.g., see the edge faces 22 of the insert 13) which intersect the top face to form cutting edges therewith.
  • the central insert 13 has three identical cutting edges 23, 24, 25. Bevels 33, 32 and 31 are situated immediately inwardly of the cutting edges 23, 24, 25, respectively.
  • the cutting inserts 13-19 are of positive shape, i.e., each of the edge faces thereof intersects the top face at an acute angle.
  • the degree of inclination of the edge faces relative to the top face varies around the insert. More specifically, the inclination of such edge face is greater at the corner regions of the insert than at the intermediate regions of the edge face.
  • intermediate region is meant a region of the edge face situated between the corner regions of the insert.
  • First and second ones of the additional inserts 16 and 19 have their active cutting edges located on opposite sides of the axis 11 and substantially in a common first radial plane Pl which contains the axis 11 (see FIG. 1).
  • a third one of the additional inserts 15 has a convexly curved active cutting edge arranged substantially in a second plane P2 which is different from the first plane and which contains the axis 11.
  • Fourth and fifth ones of the inserts 14, 18 have straight main cutting edges arranged substantially in a common plane, e.g., the second plane P2, which is oriented substantially perpendicular to the first plane Pl and which contains the axis 11.
  • the inserts 14, 15 and 18 have their active cutting edges arranged substantially in the second plane P2.
  • a sixth one of the additional inserts 17 has a convexly curved active cutting edge arranged substantially in a third plane P3 which contains the axis 11 and which is different from both of the first and second planes P1, P2.
  • the sixth additional insert 17 could be positioned such that its cutting edge is arranged substantially within the second plane P2.
  • the inserts 15 and 17 are located axially rearwardly relative to the central insert 13 and axially forwardly relative to the inserts 16 and 19.
  • the inserts 16 and 19 are located axially forwardly relative to the inserts 14 and 18.
  • the inserts 14 and 18 have straight active cutting edges arranged substantially diametrically opposite one another and extending substantially parallel to the axis 11.
  • the inserts 14 and 18, which are located axially rearwardly of all other inserts, are provided with straight elongated main cutting edges 14a and 18a.
  • the more forwardly located inserts 15, 16, 17 are provided with cutting edges 15a, 16a, 17a which are convexly curved when viewed in a direction toward the respective top face (e.g., see FIG. 4).
  • the inserts 19, which is visible in FIG. 1, has a design corresponding to that of the inserts 15, 16, 17.
  • Inserts 14 and 18 could alternatively be square in shape. In another embodiment, insert 14 could have a design similar to insert 15.
  • the cutting edges of the insert 13 comprise a plurality of main cutting edges 23, 24, 25 each extending between the insert corners, and a plurality of secondary cutting edges 26 extending around the insert corners.
  • Each of the secondary cutting edges 26 is generated by a radius R (see FIG. 1).
  • Each main cutting edge is convexly curved when viewed in a direction toward the respective edge face (see FIG. 1A).
  • FIG. 1A When the insert 13 is viewed in plan (FIG. 1), it can be seen that each of the secondary cutting edges 26 is convexly curved. As a result, the chips produced will be curved and small and thus can be easily transported away from the center of the tool.
  • Each of the secondary cutting edges 26 intersects two of the main cutting edges.
  • the secondary cutting edge 26 shown at the lower right in FIG. 1 intersects the main cutting edge 25 at point 27', and intersects the main cutting edge 23 at point 27A.
  • a line drawn tangent to point 27A coincides with the main cutting edge 23.
  • a line drawn tangent to the point 27' forms an obtuse angle ⁇ with the main cutting edge 25.
  • each of the secondary cutting edges is not symmetrical about a plane bisecting the corner.
  • the edges 24 and 25 intersect the secondary edges at points 27" and 27"', respectively.
  • the insert 13 is positioned such that the main cutting edge 23 constitutes the "active" main cutting edge (the other main cutting edges 24, 25 being inactive).
  • the secondary cutting edge which constitutes an active secondary cutting edge is the one located adjacent the center axis 11 of the mill. It is preferable that the active secondary cutting edge intersect or at least nearly intersect that center axis when viewed in FIG. 1.
  • edge build-up can occur as the result of the adhesion of undesirable material to the cutting edge (the undesirable material coming from the workpiece), and could lead to premature failure of the cutting edge.
  • the top face 21 of the insert 13 is shaped so that each of the three corner regions 28 is located at a different elevation relative to other portions of the top face 21.
  • a central portion 36 of the top face which surrounds the aperture 28 is situated at an elevation higher than the corner region 28, as shown in FIG. 7.
  • an intermediate portion 30 of the top face situated between the portion 36 and the corner region 28 is at a lower elevation than adjacent beveled portions 31, as is apparent from FIG. 8.
  • the insert 13 is so constructed and arranged that, as shown in FIG. 2, two lines drawn from a center of the radius R' (FIG. 2) to the points 27', 27", respectively, form an acute angle ⁇ of about 30 degrees.
  • the insert 13 includes a plurality of interjacent surface portions extending from the central portion 36 to the mid-region of a respective main cutting edge.
  • each interjacent surface portion includes (i) a beveled face 32 (or 31 or 33) having a width a, (ii) a flat part 34 (having a width b) which is parallel to the bottom face 20, and (iii) an obliquely inclined part 35 (having a width c) which connects the flat part 34 with the central portion 36.
  • the flat part 34 lies at a higher elevation than the central portion 36.
  • each of the beveled faces 31, 32, 33 is such as to provide a substantially constant clearance angle.
  • the width b is larger than the width a of the beveled face.
  • the width a should preferably be approximately one-half the width b.
  • this end mill As a drilling end mill. For instance, it has been found possible to drill a hole to a depth of one-half of the diameter of the end mill in a normally workable metal workpiece. It is also possible to use this tool for drilling obliquely in relation to the longitudinal axis, i.e., so-called ramping.
  • the invention makes such metal working possible within an angular range from the angle 0 to 90 degrees.
  • FIGS. 9-11 An alternative embodiment of the central insert is shown in FIGS. 9-11 in which the central insert 13A is provided with recesses 37 of concave shape, each of which intersects and extends through the respective main cutting edge for the purpose of obtaining increased clearance of the central portion of the tool during a working operation. This contributes to avoiding small pieces breaking off from the edge which could cause tool failure.
  • This recess 37 starts at about the point 27' (or 27" or 27"') and extends along a limited portion of the adjacent main cutting edge.
  • the recess 37 extends obliquely inwards in relation to the main cutting edge, whereby the extension inwards substantially corresponds to the double the width a of the beveled face 33.
  • the insert 13A is provided with a strengthening face 38 on its chip surface which extends adjacent to the beveled face 33.
  • the strengthening face 38 intersects with the beveled face at an angle of 75 to 85 degrees.
  • the clearance face 22 extends downwards and intersects at an obtuse angle with an edge surface 39 which is obliquely oriented in relation to the bottom face 20.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Milling Processes (AREA)
  • Crushing And Grinding (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
  • Disintegrating Or Milling (AREA)
US07/717,644 1990-06-19 1991-06-19 Ball end mill and throw away insert for such end mill Expired - Fee Related US5190419A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9002171 1990-06-19
SE9002171A SE466435B (sv) 1990-06-19 1990-06-19 Radiepinnfraes med vaendskaer

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US5190419A true US5190419A (en) 1993-03-02

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US07/717,644 Expired - Fee Related US5190419A (en) 1990-06-19 1991-06-19 Ball end mill and throw away insert for such end mill

Country Status (8)

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US (1) US5190419A (de)
EP (1) EP0462954B1 (de)
JP (1) JPH04226827A (de)
AT (1) ATE110607T1 (de)
BR (1) BR9102491A (de)
DE (1) DE69103691T2 (de)
ES (1) ES2059102T3 (de)
SE (1) SE466435B (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5542792A (en) * 1993-12-21 1996-08-06 Waukesha Cutting Tools, Inc. Cutting device with removable nosepiece
US5741095A (en) * 1993-03-12 1998-04-21 Valenite Inc. Cutting tool and insert therefor
US5921720A (en) * 1998-01-23 1999-07-13 Lemke; Carl Ball nose cutting tool with center mounted tool bits
US6722826B2 (en) 2001-09-11 2004-04-20 Brian M. Cavanaugh Internal cavity cutting tool with stable support
US6802676B2 (en) 2001-03-02 2004-10-12 Valenite Llc Milling insert
US20100239379A1 (en) * 2007-08-29 2010-09-23 Taegutec, Ltd Cutting Insert
CN101043964B (zh) * 2004-10-20 2012-06-13 山高刀具公司 切削刀片和切削工具
CN102962505A (zh) * 2012-11-12 2013-03-13 大连经济技术开发区伊达工具有限公司 一种错齿pcd球头铣刀
US20130142581A1 (en) * 2011-02-27 2013-06-06 Kennametal Inc. High feed cutting insert
US20130220485A1 (en) * 2012-02-29 2013-08-29 Svante Larsson Cutting tool
WO2015129768A1 (ja) * 2014-02-26 2015-09-03 株式会社タンガロイ 刃先交換式回転切削工具
US9782842B2 (en) 2013-07-31 2017-10-10 Noda Kanagata Co., Ltd. Method of manufacturing an elbow, cutting tool, and elbow

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2513645Y2 (ja) * 1991-05-22 1996-10-09 三菱マテリアル株式会社 ボ―ルエンドミル
DE19624342C1 (de) * 1996-06-19 1997-12-11 Walter Ag Schneidplatte und Fräser, insbesondere Kugelstirnfräser oder Kopierfräser
IL120137A0 (en) * 1997-02-03 1997-06-10 Iscar Ltd Cutting insert
US9700947B2 (en) 2014-06-27 2017-07-11 Kennametal Inc. Ballnose cutting tool and ballnose cutting insert
AT15151U1 (de) * 2016-02-29 2017-01-15 Ceratizit Austria Gmbh Schneideinsatz
US10632548B2 (en) * 2017-11-20 2020-04-28 Iscar, Ltd. Triangular-shaped indexable cutting insert having recessed side surfaces and rotary cutting tool
WO2021255919A1 (ja) * 2020-06-19 2021-12-23 住友電工ハードメタル株式会社 エンドミル

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US4252480A (en) * 1979-05-03 1981-02-24 Sumitomo Electric Industries, Ltd. Throw away insert and end mills
JPS5973216A (ja) * 1982-10-19 1984-04-25 Toshiba Tungaloy Co Ltd ボ−ルエンドミル
US4486127A (en) * 1981-08-27 1984-12-04 Komet Stahlhalter- Und Werkzuegfabrik, Robert Breuning Gmbh Triangular indexable cutting plate for lathe tools
US4566827A (en) * 1984-11-30 1986-01-28 Ingersoll Cutting Tool Company Ballnose end mill and insert therefor
US4618296A (en) * 1983-09-14 1986-10-21 Gte Valeron Corporation Cutting tool and insert therefor
US4699549A (en) * 1985-06-06 1987-10-13 Mitsubishi Kinzoku Kabushiki Kaisha Insert rotary cutter
EP0307949A1 (de) * 1987-09-17 1989-03-22 Sumitomo Electric Industries Limited Schaftfräser mit runder Stirn und Schneideinsätzen
US4838739A (en) * 1987-09-18 1989-06-13 Gte Valenite Corporation Ball nose end mill and method of manufacture
US4927303A (en) * 1988-09-27 1990-05-22 Mitsubishi Metal Corporation Ball end mill

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Publication number Priority date Publication date Assignee Title
GB2135612B (en) * 1983-02-22 1986-03-12 Ingersoll Mach & Tool Co Ballnose end mill and cutting insert therefor

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4252480A (en) * 1979-05-03 1981-02-24 Sumitomo Electric Industries, Ltd. Throw away insert and end mills
US4486127A (en) * 1981-08-27 1984-12-04 Komet Stahlhalter- Und Werkzuegfabrik, Robert Breuning Gmbh Triangular indexable cutting plate for lathe tools
JPS5973216A (ja) * 1982-10-19 1984-04-25 Toshiba Tungaloy Co Ltd ボ−ルエンドミル
US4618296A (en) * 1983-09-14 1986-10-21 Gte Valeron Corporation Cutting tool and insert therefor
US4566827A (en) * 1984-11-30 1986-01-28 Ingersoll Cutting Tool Company Ballnose end mill and insert therefor
US4699549A (en) * 1985-06-06 1987-10-13 Mitsubishi Kinzoku Kabushiki Kaisha Insert rotary cutter
EP0307949A1 (de) * 1987-09-17 1989-03-22 Sumitomo Electric Industries Limited Schaftfräser mit runder Stirn und Schneideinsätzen
US4898500A (en) * 1987-09-17 1990-02-06 Sumitomo Electric Industries, Ltd. Ball end mill with throw away insert
US4838739A (en) * 1987-09-18 1989-06-13 Gte Valenite Corporation Ball nose end mill and method of manufacture
US4927303A (en) * 1988-09-27 1990-05-22 Mitsubishi Metal Corporation Ball end mill

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5741095A (en) * 1993-03-12 1998-04-21 Valenite Inc. Cutting tool and insert therefor
US5542792A (en) * 1993-12-21 1996-08-06 Waukesha Cutting Tools, Inc. Cutting device with removable nosepiece
US5921720A (en) * 1998-01-23 1999-07-13 Lemke; Carl Ball nose cutting tool with center mounted tool bits
US6802676B2 (en) 2001-03-02 2004-10-12 Valenite Llc Milling insert
US6722826B2 (en) 2001-09-11 2004-04-20 Brian M. Cavanaugh Internal cavity cutting tool with stable support
CN101043964B (zh) * 2004-10-20 2012-06-13 山高刀具公司 切削刀片和切削工具
US20100239379A1 (en) * 2007-08-29 2010-09-23 Taegutec, Ltd Cutting Insert
US8328472B2 (en) * 2007-08-29 2012-12-11 Taegutec, Ltd. Cutting insert
US20130142581A1 (en) * 2011-02-27 2013-06-06 Kennametal Inc. High feed cutting insert
US20130220485A1 (en) * 2012-02-29 2013-08-29 Svante Larsson Cutting tool
CN102962505A (zh) * 2012-11-12 2013-03-13 大连经济技术开发区伊达工具有限公司 一种错齿pcd球头铣刀
CN102962505B (zh) * 2012-11-12 2015-09-23 大连经济技术开发区伊达工具有限公司 一种错齿pcd球头铣刀
US9782842B2 (en) 2013-07-31 2017-10-10 Noda Kanagata Co., Ltd. Method of manufacturing an elbow, cutting tool, and elbow
WO2015129768A1 (ja) * 2014-02-26 2015-09-03 株式会社タンガロイ 刃先交換式回転切削工具
JP5954608B2 (ja) * 2014-02-26 2016-07-20 株式会社タンガロイ 刃先交換式回転切削工具
US9764397B2 (en) 2014-02-26 2017-09-19 Tungaloy Corporation Indexable rotary cutting tool

Also Published As

Publication number Publication date
SE9002171L (sv) 1991-12-20
BR9102491A (pt) 1992-01-21
EP0462954B1 (de) 1994-08-31
EP0462954A3 (en) 1992-06-03
ATE110607T1 (de) 1994-09-15
ES2059102T3 (es) 1994-11-01
JPH04226827A (ja) 1992-08-17
DE69103691T2 (de) 1994-12-22
SE9002171D0 (sv) 1990-06-19
EP0462954A2 (de) 1991-12-27
DE69103691D1 (de) 1994-10-06
SE466435B (sv) 1992-02-17

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